MILAN, Italy — Prime Minister Silvio Berlusconi paid for sex with an underage Moroccan teen 13 times at his villa near Milan, prosecutors said in a document filed yesterday seeking indictments against three aides for allegedly soliciting prostitutes for the Italian leader.

The seven-page document, obtained by The Associated Press, alleges that the sex-fueled parties started with dinner, progressed to erotic dancing involving the premier, and culminated with Berlusconi’s choice of a sex partner — or partners.

Prosecutors have formally closed the investigation and are seeking indictments against the three aides, whom they accuse of identifying possible sex partners for Berlusconi and informing them of payment and other compensation “that they would have received for their sexual availability.”

Berlusconi separately faces trial April 6 in Milan on charges of underage prostitution and using his influence to cover it up.

A judge must now decide whether to indict the three aides and start a separate trial.

Berlusconi has denied all charges, and his lawyers have filed a complaint with Rome prosecutors, saying they feared a setup.

The Moroccan teen, Karima el-Mahroug, known by her nickname Ruby the Heartbreaker, also has denied having had sex with the premier and says she has never acted as a prostitute.

Besides Ruby, the document identifies 32 other women whom the three aides involved in parties at Berlusconi’s villa.

The prosecutors allege the aides acted together in a criminal scheme to induce Ruby into prostitution.

The document says Ruby “committed sexual acts with Silvio Berlusconi, for payment in cash and other compensation, at his residence” on 13 occasions from Feb. 14, 2010, to May 2, 2010. Ruby, who has since turned 18, was 17 at the time.